759.simple(形)單純的、簡單的
Such a toy is simple to make.這種玩具做起來很簡單。

760.since(介)自……以來、從……至今
I haven't heard from him since last year.我自去年以來未曾聽到他的消息。

761.sing(動)唱、歌唱
不規則變化sang, sung
She sang to the guitar.她和著吉他歌唱。

762.singer(名)歌手
His mother was an opera singer.他的母親是一位歌劇演唱家。

763.sir(名)先生、閣下
This way, sir.先生，這邊請。

764.sister(名)姊;妹
She is elder sister to Susan.她是蘇珊的姐姐。

765.sit(動)坐
不規則sat, sat
They sat in a ring，他們坐成了一圈。

766. six(形)六的、六個的
I work six days every week.我每星期工作六天。

767.sixteen(名)十六、十六歲
She is a young woman of sixteen,她是一個十六歲的少女。

768.sixth(名)第六、第六個
He is the sixth to arrive.他是第六個到的。

769.sixty(形)六十的
Sixty persons are working there.有六十個人在那工作。

770.size(名)大小、尺寸
What's the size of the park?這個公園有多大?

771.shirt(名)裙子(動)位于……之邊緣
(名):The little girl was dressed in a very short skirt.小女孩穿了一條很短的裙子。
(動):The boys shirted the field so as not to damage the crops.為了不損壞莊稼，孩子們繞著田邊走。

772.sky(名)天空
There were no clouds in the sky.萬里無云。

773.sleep(名)睡眠(動)睡著
不規則變化slept, Slept
(名):It seems that you haven't got enough sleep.看來你睡眠不足。
(動):He was still sleeping when I went in.我走進去時他還在睡覺。

774.slow(形)緩慢的
反義詞fast
He's a slow walker.他走起路來慢吞吞的。

775.small(形)小的；少的
反義詞big
My bedroom is smaller than yours.我的臥室比你的小。

776.smart(形)精明的、聰敏的
反義詞stupid
He is smart and can take care of himself.他很精明可以照顧自己。

777.smell(名)嗅覺(動)嗅出
(名):Dogs have a very good sense of smell.狗的噢覺很靈敏。
(動):I can small something burning.我聞到有燒焦的氣味。

778.smile(名)微笑、笑容(動)微笑
(名):She welcomed him with a smile.她笑著表示歡迎他。
(動):What are you smiling at?你笑什么？

779.smoke(名)煙(動)冒煙；抽煙
(名):She can't stand the smell of tobacco smoke.她受不了香煙的氣味。
(動):A chimney could be seen smoking in the distance.看得見遠處的煙囪在冒煙。

780.snack(名)點心、小吃
He ate a snack in the morning.他早士上吃了一份點心。

781.snake(名)蛇
The child was frightened by the snake.這小孩被蛇嚇了一跳。

782.snow(名)雪(動)降雪
(名):A beggar was lying dead in the snow.一個過世的乞丐躺在雪地里。
(動)It has snowed for three days running.已接連下了三天的雪。

783.so(副)至某種程度、如此
I'm so pleased to see you.看到你我真高興。

784.sock(名)短襪
慣用復數
He was five feet in his socks.他穿著襪子身高為五英尺。

785.sofa(名)沙發
Please sit on the sofa.請坐在沙發上。

786.some(形)少許、一些、某些
I have some work to do this evening.今晚我有事要做。

787.someone(代)有人、某人
同義詞somebody
Someone left this for you.有人把這留給你。

788.something(代)某事、某物
I have something to ask you.我有事情要問你。

789.sometimes(副)有時
Tom comes to visit us sometimes.湯姆有時來看我們。

790.somewhere(副)在某處；大約、大概
Can you put her up somewhere tonight?你能不能給她個晚上住的地方？

791.son(名)兒子
反義詞daughter
Mike was the third of five sons.在五個兒子中麥克排行老三。

792.song(名)歌
He likes popular songs.他喜歡流行歌曲。

793.soon(副)不久、馬上
It will soon be Christmas.圣誕節很快就要到了。

794.sorry(形)難過得、惋惜的、抱歉的
We're sorry to be late.對不起，我們來遲了。